Compensated magnetic sensor for use on highly magnetized vehicle

Compensating magnetic compass

Compensation system for electronic compass

Compensation system for electronic compass

Compensation system for electronic compass

Compensation system for electronic compass

Compensation system for electronic compass

Component piano string angle gauge

Composite level construction

Composite level including an indexing system for aligning the fr

Conduit bending guide

Conduit bending level

Conduit bending level

Conduit bending plane and bend angle indicator

Conduit bending plane indicator

Container for liquids including a level control and a gyro compa

Continuous measurement-while-drilling surveying

Continuous measurement-while-drilling surveying

Continuous monitoring inclination sensor

Contour measuring device and method